Drill



. C. BARBER.

(NdModeL).

DRILL.

Patented Jan. 19, 1892.

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UNITED STATES PATENT OFFICE.

\VANTON O. BARBER, OF VILLISOA, I OW'A.

DRILL.

SPECIFICATION forming" part of Letters Patent No. 467,459, dated January 19, 1892. Application filed November 25, 1891. Serial No. 413,029. (No model.)

To all whom it may concern:

Be it known that I, WANroN O. BARBER, of Villisca, in the county of Montgomery and State of Iowa, have invented a new and useful Improvement in Drills, of which the following is a full, clear, and exact description.

My invention relates to an improvement in drills, and has for its object to provide a portable drill of simple and durable construction and one which is especially adapted for use in drilling railroad-rails and which is capable of satisfactory use upon many-portions of a locomotive or upon stationary engines; and, furthermore, an object of the invention is to construct the drill in a simple, durable, and economicmanner and provide a means whereby the drill may be readily fed forward or backward and whereby, also, while the drill is in operation it will be automatically fed forward while being revolved.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a central longitudinal section through the drill and its base, the said section being taken practically on the line a; as

of Fig. 3. Fig. 2 is a side elevation of the drill, and Fig. 3 is a plan view thereof.

The bed or platform 10 of the drill consists,

preferably, of a plate of metal on a block of wood and is usually made rectangular in general contour. -At each side of the bed an arm 11 is rigidly secured, which arms extend beyond one end of the bed and are curved upward, terminating in hooks 12, as is best shown in Figs. 1 and 2, the said hooks being adapted to clamp the tread of a rail when the drill is to be used upon the web thereof. The arms 11 constitute guides for a frame 13, carrying the driving mechanism of the drill, which frame is held to loosely slide upon the bed or platform between the arms, as shown in Fig. This frame is made rectangular in general contour and is of skeleton form. The mandrel 14, to which the drill 15 is attached, is held to loosely turn in that end of the frame 13 facing the hook extremities of the arms 11 and also in eross-bars 16, located near the rear of the frame, parallel one with the other and spaced a slight distance apart. That end of the mandrel passing through the cross-bars 16 is threaded, and upon this threaded portion of the mandrel a feedwheel 17 is located,the said wheel being provided with an aperture to re ceive the mandrel, the walls of which aperture are thread ed. The feed-wheel partakes somewhat of thenatu reof a ratchet-wheelandis constantly engaged by a dog 18, which dog is pivotally attached to a crank-shaft 19, journaled in bearings secured at one side of the frame, the crank-shaft being provided with an upwardlyextending arm 20, terminating, usually, in a circular head 21. The dog is maintained in constant engagement with the feed Wheel through the medium of a spring 22, as is best shown in Fig. 2. The head or socket 23 of the mandrel, in which the drill 15 is secured, is located outside of the frame 13, so that the drill cannot move laterally inward; but the drill may be fed laterally outward through the medium of the feed-wheel 17, above re ferred to.

A standard 24 is secured at its lower end in the frame, and upon the upper portion of this standard the drive-shaft 25 is journaled. This drive-shaft is provided at one end with a gear 26, adapted to be turned by hand through the medium of an attached handle 27, and at the opposite end of the drive'shaft a wheel 23 is secured, the outer side face of which wheel has formed thereon two camsurfaces 29 and 30, preferably diametrically opposite.

The driving-gear 2G meshes with a pinion 31, journaled upon a short shaft within the frame. This pinion has formed upon its inner face a beveled pinion 32, which meshes with a similar pinion 33, secured upon the mandrel, and by this means the mandrel is revolved whenever the driving gear 26 is turned.

The cam-wheel 28 is adapted to operate the feed mechanism, and to that end the head 21 of the arm 20, emanating from the crank-shaft 19, is adapted to engage with the side surface of the cam-wheel and travel upon the camsurfaces thereof, as is best shown in Figs. 2 and 3. The frame is fed forward through the medium of a lever 34, fulcrumed upon one of the arms 11 of the bed or platform and connected with the back of the frame, as is best shown in Fig. 3.

In the operation of the device when the web of a rail is to be drilled, for instance, the hooks 2 of the arms 11 are made to grip the treads of the rail and the frame is fed forward by manipulating the lever 34: until the drill engages with the rail-web. The lever is then held from slipp1ng by engaging with a pin 35, or any other form of locking device maybe employed, the said pin being capable of adj ustmentupon the base. The operation of drilling is then commenced by rotating the drive-shaft 25, whereupon a rotary movement is imparted to the drill-mandrel, and as soon as the arm 20 of the crank-shaft19 of the feed mechanism engages with a cam-surface of the wheel 28 the arm is forced upward and that-portion of the crankshaft to which the dog is attached is carried inward. Thus the feed-wheel is rotated one or two teeth, according to the distance of the inward throw of the crank-shaft, and the drillma-ndrel is thereby revolved in a direction to force its head laterally outward from the frame. By this means it will be observed that while the drill is being turned it is also at proper intervalsbeing fed in direction of the article upon which it is operating.

It is obvious that the device is exceedingly simple and durable, and, further, that it is economic in construction. If in practice it is found desirable, a pad of any description may be placed upon the platform or bed, enabling the operator with comfort to add his weight to the weight of the bed.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a drill, the combination, with a bed provided with guides and a shifting-lever, of a frame held to slide upon the bed between the guides and having connection with the shifting-lever, a mandrel held to turn in the frame and adapted to carry a drill, a driveshaft located above the frame, a driving mechanism connecting the drive-shaft with the drill-mandrel, a feed-device connected with one end of the mandrel, and a connection, substantially as shown and described,

between said device and the drive-shaft, as and for the purpose specified.

2. In a drill, the vcombination, with a bed provided with guide-arms extending beyond the bed and terminating at their projecting ends in clamps and a shifting-lever fulcrumed upon the bed, of a frame held to slide upon the bed between the guide-arms, a mandrel held to revolve in the frame and adapted to carry a drill, one end of which mandrel is threaded, a feed-wheel having a toothed periphery and a threaded bore and mounted upon .the threaded end of the mandrel, a crank-shaft, a dog carried by the crank-shaft and engaging with the feed-wheel, a driveshaft provided at one end with adriving-gear and at the other end with a cam-faced wheel, a gear connection between the driving-gear and the drill-mandrel, and an arm connected with the crank-shaft of the feed mechanism and having a bearing upon a cam-surface of the cam-Wheel, substantially as and for the purpose set forth.

3. In 'a drill, the combination, with a bed, guide-arms attached to the'bed and projected beyond one end, the projecting ends of the guide-arm's being formed as hooks, a shiftinglever ful'crumed upon the bed, and a frame held to slide upon the bed and connected with the shifting-lever, of a mandrel adapted to carry a drill journaled in the frame, t-he head of the mandrel being outside of the frame and its inner end being threaded, a feed- Wheel provided with a threaded bore and mounted upon the threaded portion of the mandrel, a crank-shaftjournaled at one side of the frame, a spring-pressed pawl carried by the crank-shaft and engaging with the feed-wheel, a drive-shaft, a driving-gear carried by the shaft, a train of gearing connect ing said driving-gear with the mandrel, a camfaced wheel also secured to the drive-shaft, and a connection between the cam-surfaces of this wheel and the erank-sh'afn'substautially as shown and described.

WANTON O. BARBER. Witnesses:

A. E. MITCHELL, J. S. JACKSON, 

